Tag: dotnet-10

Both end in the same OS call, so the timestamp written is identical. The differences are around it: which cache gets invalidated, whether directories work on Windows, how a non-UTC DateTime is converted, and whether you can target an open handle. Use File.SetLastWriteTimeUtc, by handle when the file is open. Verified on .NET 10.0.10.

The version exists, but the pipeline cannot see it. Check the build identity's feed role, the feed view in the URL, which nuget.config the task uses, package source mapping, and the 30-minute HTTP cache.

Code resolved a service from a DI scope or root provider after it was disposed. Capture IServiceScopeFactory instead of IServiceProvider and create a fresh scope where the work runs.

CS8618 is checked when the constructor exits, and [MemberNotNull] on a static method is silently ignored for instance members. Pass the values into a private constructor instead.

The Set-Cookie header is sent, but the browser rejects or never stores it. Fix SameSite=None without Secure, missing credentials: 'include' plus AllowCredentials, consent policy, and late Append calls.

EF Core never updates a key value on a tracked entity. Stop copying the key from DTOs, use a unique index instead of an alternate key, and change a real key by inserting a new row and deleting the old one. Tested on EF Core 10.0.14.

A peer sent RST_STREAM with PROTOCOL_ERROR for one request. HttpClient never retries it. Find which hop reset the stream, fix the request it rejected, retry only idempotent calls, or drop that hop to HTTP/1.1.

An expired MemoryCache entry is not removed on a timer. It stays in the dictionary until a read touches it, a throttled background scan runs, or compaction kicks in. Here is exactly when each happens, and how to get eager eviction.

Microsoft.AspNetCore.OpenApi only marks a response nullable when the action returns a bare T? (and, on .NET 10, not even Task<T?>). ActionResult<T?> and IActionResult lose the annotation on both .NET 10 and .NET 11 RC2. Here is why, a tested operation transformer that fixes it, and the 204 No Content trap that makes the spec lie unless you also change MVC's formatter.

A with expression calls the record's compiler-generated <Clone>$ method, which runs a copy constructor that copies every instance field and skips all initializers. That is why properties initialized from other properties, cached values, and Guid IDs come out stale. Measured on .NET 10 with C# 14, with the fixes that actually work.